Furnace



July 1, 1930. G. L. DANFo-RTH, JR

FURNACE Filed Jari. 2s. 1922 2 sheets-.sheet 1 gf kg. j H H j@ /-W 16 210 J5 j! 4 I l] l v 13 75. '14/ July 1, 1930. G. DANFORTH. JR 1,769,210

FURNACE Filed Jam. V28', 1922 2 sheets-sheet 2.

awww @QZ/W w N Patented July 1, 1930 GEORGE L. DANFORTH, JR., OFCHICAGO,

ILLINOIS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO OPEN HEARTH COMBUSTIONCOMPANY, OF CHICAGO, ILLINOIS, A

CORPORATION OF DELAWARE FUR/NACE Application led January 28, 1922.Serial No. 532,441.

improved construction of ports and passages in connection withreversible regenerative furnaces.

As is well known in the art, reversible regenerative furnaces, such asopen hearth steel furnaces, are provided with similar ends and the portsand passages upon opposite ends serve alternately to introduce the airand fuel and to conduct away the products of combustion. Since theproducts. of combustion exceed in volume the entering airand fuel, it isnecessary to provide ports and passages of an area adapted to carry olfthe products of combustion. Ports of this necessary area do notadequately direct and control the incoming air and gases and hence donot provide the most eifcient working flame. 'Furthermore, the design ofa port for introduction of gases is of necessity different from thatmost desirable for carrying of gases in the opposite direction.

Various constructions, such as that shown in the patent to. McKune, No.1,339,855, dated May 11, 1920, have been vdesigned whereby additionalpassages A are provided upon the outgoing end, these passages beingclosed by dampers upon the incoming end.

According to the presentinvention, the air uptakes, which also serve asdowntakes to carry oif the products of combustion, are provided withdampers adjacent their point of junction with the furnace proper. The

present furnace is adapted for use with liquid or gaseous fuels whichare not'preheated and supplemental passages are provided connecting theuptakes at a point below the dampers to the fuel introduction port.

It is an object of the present invention 'to provide a furnaceconstruction such that adequate port area is provided for carrying offthe products of combustion and such thatthe incoming air is properlydirected to produce an efficient working fiame.

It is a further object to provide a construction of this character inwhich spaced ports of relatively great area are provided for carrying 0Hthe products of combustion and in which a port of comparatively smallzftrei is provided for introducing the air and It is an additionalobject to provide a construction which is simple in design and which maybe applied to existing installations without material alterationthereof.

Other and further objects will appear as the description proceeds.

I have illustrated a particular embodiment of my invention in theaccompanying drawings, in which- Figure 1 is a vertical section showingan end of the furnace constructed according to my invention.

Figure 2 is a horizontal section, partly broken away; and

Figure 3 is a transverse vertical section through the furnace end.

As shown in the drawings, the furnace chamber 4 is provided at eitherend with the spaced discharge ports 5 which lead downwardly adjacent theend walls 6 of the furnace. Outwardly inclined passages 7 which serveboth as uptakes and downtakes lead from these ports to the slag pocket8, the upper portion of the slag pocket being directly connected to thechecker chambers 9. The-horizontal dampers 10 are located adjacent theupper ends of the uptakes. As shown these dampers are horizontallymovable by means of the shaft 11 which is provided with gears 12 meshingin yracks 13 connected to the dampers.

Supplementary passages 14 lead from t-he uptakes 7 at points below thedampers 10 and these passages extend horizontally at 15 and togetherjoin to form the passage 16 leading to the entrance port 17. Thisentrance port 17 is directed through the watercooled opening 18 in thefurnace end wall. It will be observed from Figure-2 that the entranceport 17 is directed intermediate the two discharge ports 5. The nozzle19 is introduced through the rear of the port and serves to introducethe fuel.

Upon the incoming end of the furnace, the dampers 10 close off thedischarge ports 5. The reheated air comes through the checker amper 9and up the upstakes 7 and thence through the supplemental passages 14 tothe port 17.- rlfhe fuel is introduced through nozzle 19. This entranceport 17 serves to adequately direct and control the incoming air andfuel and an eicient iame maybe maintained.

Upon the outgoing end, the dampers 10 are drawn outwardly and theproducts of combustion may pass directly through the ports 5 and thencedown the uptakes 7 and out through the checker chamber. Thus an adequatearea is provided for the products of combustion and these are readilyconducted away without the necessity for forced`draft means. Further,the wear upon the entrance -port 17 due to the erosion caused by heatedoutgoing gases is materially reduced.

The form of construction shown is illustrative only and it is myintention to cover all modifications coming within the spirit and scopeof the appended claims.

I claim:

1. In a regenerative furnace, a pair of uptakes connecting theregenerators and the furnace chamber at each end thereof, the uptakesterminating in spaced ports in the furnace floor, and an incoming fueland air port extending` through the furnace wall intermediate the spacedports, said fuel and air ports being independent of the furnace walls.

2. In a regenerative furnace, a pair of uptakesl connecting theregenerators and the furnace chamber at each end thereof, the uptakesterminating in spaced ports in the furnace Hoor, an incoming fuel andair port directed intermediate the spaced ports, and supplement-arypassages connecting the. uptakes and the fuel and air port.

3. In a regenerative furnace, a pair of uptakes connecting theregenerators and the furnace chamber at each end thereof, the uptakesterminating in spaced ports in the furnace floor, an incoming fuel andair port directed intermediate the spaced'ports, supplementary passagesconnecting the uptakes and the fuel and air port, and dempers located insaid uptakes above the junctions of the supplementary passages with theuptakes.

4. In a regenerative furnace, furnace ends vof Januar 1922.

EoRGE L. DANFORTH, JR.

having uptakes terminating in the Hoor of the ends, each end beingunobstructed between the termination of the uptakes therein, and a portin the end wall of the furnace terminating between the uptakes.

5. In a regenerative furnace, furnace ends having uptakes terminating inthe floor of the ends, each end being unobstructed between thetermination of the uptakes therein, dampers in said uptakes, and a portin the end wall of the furnace terminating between the uptakes.

6. In a regenerative furnace, furnace ends i having uptakes terminatingin the Hoor of the ends, each end being unobstructed be-

